Check valve device



Nov. 29, 1932'. E- E HEW'TT 1,889,122

CHECK VALVE DEVICE Filed Nov. 24, 1930 INVENTOR.

ELLIS E. HEW ITT A TTORNEY.

Patented Nov. 29, 1932 UNITED STATES ELLIS E. HEWITT, 0F nnenwoon, PENNSYLVANIA, AssIGNoR To `'man wEsTINGHoUsE AIR BRAKE COMPANY, or WILMERD'ING, PENNSYLVANIA, A coRoRA'rIoNoF PENN- SYLVAIN IA CHECK VALVE DEVICE l Application med November 24,1930. serialinafiaavze.

Ain the following mo-re detailed description of the invention. Y

In the accompanying drawing, the single figure is a sectional view through a portion of a casing having my improved check valve construction embodied therein.

In the drawing, the reference character 1 indicates a portion of the casing of any part or device of a fluid pressure equipment, said casing having a recess 2 formed therein which is open at one end. The open end of this recess is adapted to be closed by a cover plate 3 which may be removably secured to the casing by stud bolts 4, only one of which is shown. v

Contained in the recess 2 and having leak proof engagement with the casing 1 is a valve seat member 5 having a recess 6 in which is contained a ball check valve 7 which is adapted to seat on a valve seat surface 8 on the member to close communication from the recess 6 to a fluid pressure supply chamber 10 and supply passage 11 by way of a passage 9 in the member.

The valve seat member 5 is also provided with an annular seat rib 12 upon which a disc check valve 13 is adapted to seat, said seat rib defining the upper end of the recess 6. Interposed between vand engaging an inner surface of the cover plate 3 and theback of the check valve 13 is a coil spring 14.-, the pressure of which tends to urge the valve to its seat.

The valve seat member 5 is further provided with an annular guide portion 15 which surrounds the seat rib 12 and check valve 13 and is for the purpose of preventing eX- cessive transverse movement of the check valve 13. This guide portion is provided withopenings 16 through` which fluid is adapted to flow to an outlet passage 17 in the casing.

From the foregoing description, it will be noted that in `my improved check valve construction there is a single valve seat member mounted in a single recess ina casing which has two valve seats for two check valves arranged in series, the check valve 7 being preferably in the form of 'a balland being adapted to be seatedby the 1force of gravity,

andthe check valve 13 being preferably in Vthefor'mof adisc which is adapted to be seated by the force 'of a s ring.

In assembling the checz valve construction the valve seat member is first inserted in the recess 2 and then pressed to its proper position in the casing. After the seat member is thus positioned, the ball check valve 7 is placed in the recess 6 after which the ldisc valve 13 is inserted in the guide portion 15, and the spring 14 is mounted on the back of the valve 13. Finally, the cover plate 3 is secured in place on the casing.

In an application of Clyde C. Farmer, filed July 24, 1930, and serially numbered 470,292, a check valve construction is disclosed and claimed, in which a plurality of check valves are arranged in series in aV embodiment or otherwise than by the terms of the appended claims.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is: Y

1. Ina check valve construction, the combination with a casing having a single check valve receiving recess open to an inlet and an outlet passage, of a single valve seat member carriedk by sai-d casing within said recess, an annular seat ribv on said member, a valve seat formed on said member below said seat rib, a disc check valve adapted to seat on said seat rib, an annular sleeve surrounding said seat rib and the periphery of said disc valve Qrir-Tl:NTV oF'FIcE and forming a uide for said valve for the full travel of t e valve, and a ball check valve adapted to seat on said valve seat, said cheek valves when seated closing communication from the outlet passage to the inlet K passage. -Y .f f i 2. Inlz a check valve construction,.the combination with a casing having a single @heck valve receiving recess open to an inlet and an annular seat rib on said member, a valve seat formed on said member belovvsai'd seatl rib, a disc check valve adapted t0 seat on said seat rib, an annular sleeve'surrounding` said seat rib andthe periphery of saiddlisc valve and forming a'guide for saidvalve for the full 4travel .ofthe valve, saidsleeve having oiitlet' passages arranged belovv said disc valve and open t said outlet passage, and a ballncheckvalve adapted to seat on said val-ve seat, vsaid dise check valve and ball check valve Whenseated closing communifcatinfrom the outlet passages in the guide i sleeve vand the inlet 'passage'.V

In 'testimony whereof vlfhave vhereuntey set myha-n'd, this 20th day of November, 1930.

lanoniffletpassage,y of a 'single' valveseat inem#` ber carried 'by' said easing-within' said recess;- 

